Software Programming is naturally fun but making something physical, to interact with the world that you live in, is like magic. Is even funnier when you can reuse your knowledge and JavaScript to do it. This talk will present real use cases of automating a house using JavaScript, Instead of using C++ as usual, and Espruino as dev tools and Microcontrollers such as Arduino, ESP8266, RaspberryPI, and NodeRed to control lights, doors, lockers, and much more. This talk will cover the following topics: - How to use JavaScript instead of C++ for development on microcontrollers - How to use low-cost devices and start automating your home - Introduction to Espruino, limitations, and challenges